1901] Sargent, — Crataegus in the Province of Quebec 73 
MOoLLEs. 
Crataegus Canadensis. Leaves ovate, short-pointed broadly 
cuneate, or on leading shoots truncate at the base, slightly lobed 
usually only above the middle with short broad acute lobes, coarsely 
and frequently doubly serrate often to the base with spreading 
glandular teeth; in early spring coated above with soft white hairs and 
below with dense hoary tomentum ; at maturity thin and firm, blue- 
green, glabrous or scabrate on the upper surface, paler and pubescent 
on the lower surface particularly along the slender midribs and thin 
nearly straight primary veins running to the points of the lobes, 2 to 
24 in. long, 13 to nearly 3 in. wide; petioles slender, often slightly 
winged above, deeply grooved, conspicuously glandular with stipitate 
dark glands, tomentose or finally nearly glabrous, from 3 to 1 in. 
in length; stipules linear, minutely glandular-serrate, from $ to 3 in. 
long, caducous. Flowers ł in. in diameter, in broad loose compound 
thin-branched tomentose many-flowered cymes; bracts and bractlets 
linear-lanceolate, glandular-serrate, dark red in fading; calyx-tube 
broadly obconic, villose with long matted white hairs, the lobes lan- 
ceolate, acuminate, glandular with large red stipitate glands, villose on 
both surfaces, reflexed after anthesis; stamens 20; filaments slender ; 
anthers small, nearly white; styles 5, surrounded at the base by a 
thin ring of pale tomentum. Fruit in erect thick-stemmed slightly 
villose clusters, short-oblong to subglóbose, crimson, lustrous, marked 
by large pale lenticels, slightly villose at the ends, from 4 to 4 in. 
long, about $ in. thick; calyx-tube prominent with a broad, deep cav- 
ity, the lobes gradually narrowed from their broad bases, glandular, 
villose, spreading and reflexed, or often deciduous before the ripen- 
ing of the fruit; flesh yellow, thin, dry and mealy; nutlets s, thin, 
irregularly ridged on the back, about 1 in. long. 
A tree 18 to 20 feet in height with a trunk 6 or 8 in. in diameter, 
spreading branches forming a broad round-topped head and zigzag 
branchlets marked by large oblong pale lenticels, dark green and 
coated when they first appear with matted white hairs, becoming 
light orange-brown and very lustrous during their first season and 
ashy gray in their third year, and armed with stout straight or slightly 
curved lustrous chestnut-brown spines from 2 to 24 in. long. 
Flowers at the end of May. Fruit ripens after the first of October. 
Rocky limestone ridges, 7. G. Jack, Chateaugay and Caughnawaga, 
October, 1899, May and September, 1900. 
In its 20 stamens Crataegus Canadensis resembles C. mollis, Scheele, 
of the Mississippi valley and the type of the group. It differs from 
it in the color of the branchlets, in the smaller flowers, in the much 
smaller late-ripening fruit, and in the shape, size and texture of the 
leaves. The other species of this group which have been found in 
the Province of Quebec and the Atlantic States have 10 never 20, 
stamens. 
